如何判斷從didFinishPickingMediaWithInfo返回的圖像是來自相機還是相冊？

Question

我有一個視圖控制器，需要能夠從相冊和相機中選擇一張圖片。我只能有1個didFinishPickingMediaWithInfo的委託方法，雖然我可以告訴它是否是一個圖像，但我似乎無法分辨它是來自相冊還是相機（並且我需要先將它保存在相冊中）。信息中是否有任何信息可以幫助我區分兩者？

謝謝...

Answer 1

因爲UIImagePickerController傳遞給方法，所有你需要做的是：

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info { 
    if ([picker sourceType] == UIImagePickerControllerSourceTypeCamera) { 
    // Do something with an image from the camera 
    } else { 
    // Do something with an image from another source 
    } 
} 

Answer 2

在Swift3：

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject : AnyObject]) { 

    if picker.sourceType == .camera { 
     // Do something with an image from the camera 
    } 
    else { 
     // Do something with an image from another source 
    } 

    }